After returning from the warring lands of Gundalia and Neathia, Danma Kuusou and his allies resume their everyday life on Earth. A year later, the virtual arena of Bakugan Interspace has finally healed from the alien onslaught and once more serves as a haven where brawlers meet to test themselves.
Yet each time Danma"s Bakugan, Pyrus Dragonoid, unleashes its power in combat, Interspace suffers fresh disturbances. Struggling to tap into the immense abilities bestowed by Code Eve—the Bakugan Mother spirit—he cannot keep the Mechtogan inside him in check. When it breaks free, the enigmatic machine wreaks havoc on the field, striking both comrades and adversaries.
Compounding the danger, Bakugan Interspace faces another threat of infiltration. A covert operator is injecting mutated Chaos Bakugan into the network to brainwash brawlers and seize control of the virtual domain. Anticipating this looming clash, Danma must discover a method to restrain the Mechtogan"s destructive energy and unite the Battle Brawlers once more.